Blox Fruits
Rengoku Sword Guide
By Paquito Jr Conde | October 12, 2025
How to Get the Rengoku Sword
To acquire Rengoku, you must first reach the Second Sea. After achieving Level 700 and completing the Colosseum Quest in the First Sea, head to the Ice Castle in the Second Sea. There, defeat the Awakened Ice Admiral boss until he drops a Hidden Key. Use the Hidden Key to unlock a secret door inside the Ice Castle near the boss area. Inside the chamber, you’ll find a chest containing the Rengoku sword.
Acquisition Details
- Requirement: Reach Second Sea by completing the Colosseum Quest at Level 700.
- Boss: Awakened Ice Admiral inside the Ice Castle.
- Drop Item: Hidden Key (low drop chance).
- Use the Hidden Key on the secret door inside the Ice Castle.
- Chest behind the door contains the Rengoku sword.
Rengoku Stats and Skills
Rengoku is a flame-infused sword that excels in quick bursts and dash-based attacks. It offers both area and ranged options through its two signature abilities, making it valuable for PvP and grinding.
| Skill | Key | Description | Tip |
|---|---|---|---|
| Demon Slayer | Z | Performs a fast dash and slashes in a fiery burst, dealing AoE damage. | Use as a gap closer or burst finisher after stunning your opponent. |
| Burning Slash | X | Fires a long-range flame wave that burns and knocks enemies back. | Aim at groups or fleeing enemies for consistent hits. |
How to Improve Your Gameplay
Focus on timing your attacks to make full use of Rengoku’s short cooldowns and quick animation speed. Avoid using skills randomly; instead, save them for openings or counter opportunities. Combine your sword attacks with fruits that enhance mobility, such as Light, Dough, or Magma, for better control of distance and crowd management. Distribute your stat points primarily into Sword and Defense, keeping a small portion for Melee to support energy recovery. Mastering movement and positioning will allow you to land Burning Slash more reliably.
Recommended Builds
- Sword: 70% for maximum damage.
- Defense: 20% for durability in close combat.
- Melee: 10% for energy management and support.
Rengoku Combo Tips
Here are three effective combos designed for different scenarios, focusing on quick execution and strong burst potential.
Combo 1 — Light Fruit Hybrid
Light Kick (F) → Flash Step → Demon Slayer (Z) → Burning Slash (X)
Combo 2 — Dragon Fruit Combo
Dragon Claw (Z) → Flash Step → Demon Slayer (Z) → Dragon X follow-up
Combo 3 — Sword Main Burst
Air Jump → Burning Slash (X) → Flash Step → Demon Slayer (Z)
Practical Play Tips
- Save your main attacks for when enemies are stunned or slowed.
- Use obstacles and environment to your advantage for positioning.
- Practice combos repeatedly until execution becomes smooth.
- Farm the Ice Admiral with a small party to improve key drop efficiency.
This guide explains how to unlock and use the Rengoku sword in Blox Fruits. Learn how to defeat the Awakened Ice Admiral for the Hidden Key, master the sword’s Demon Slayer and Burning Slash abilities, and apply the recommended builds for PvP or grinding. Use the provided combos and tips to improve your timing, movement, and control. With practice, Rengoku becomes a powerful weapon for any playstyle.